City of Helena · Community Development · UDO Working Concept

Chapter 4 — Form & Dimensional Standards Worksheet

Numeric values across the four district families. General dimensional standards (lot, setbacks, height) port from current Chapter 4 Table 2. Form standards (site, building placement, height/massing, activation) port from current Chapter 9 where it applies (downtown and TR); elsewhere they are best-guess starting values derived from the intensity ladder, available for staff to review and revise. The worksheet shows the green baseline, the diff in saturation, and the direction in color: yellow = more permissive of building envelope, blue = more constrained.

Reading the color — each cell is a diff against the current code Matches current code Larger envelope (height up, setback down, coverage up) Smaller envelope (height down, setback up, coverage down) TBD — not yet decided Changed, but baseline non-numeric (text comparison) Tags — direction the value scales more larger value = larger building envelope less larger value = smaller envelope (a constraint) neutral design feature, no clear permissiveness direction

The general dimensional standards (the first section) port faithfully from current 11-4-2 Table 2 for every district that has a current-code analogue. The form standards (sections 2–7) are currently only enforced under 11-9-7 against the DT and TR districts; in this worksheet, only CMX-5 (the DT successor) and the RMX-3/RMX-4 columns (where TR is absorbed) inherit those values. Everywhere else, the form standards start TBD, because the question of whether and how to extend the Chapter 9 vocabulary into the rest of the family structure is the office's decision, not a port. Saving downloads a JSON record of every value set; loading restores it. The file is the record — hand it back to whoever maintains the working files and the set values fold into the primer.